From d7587defa3cedd6e7ea6d0623aa8cd0f6b27819c Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 2 Oct 2022 18:16:27 +0100
Subject: Add support for searching a network for a ray intersection

---
 game/network/network.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'game/network/network.h')

diff --git a/game/network/network.h b/game/network/network.h
index 2ce45f7..64f3f91 100644
--- a/game/network/network.h
+++ b/game/network/network.h
@@ -9,23 +9,30 @@
 #include <sorting.hpp>
 #include <string>
 #include <utility>
+#include <variant>
 
 class Texture;
 class Shader;
+class Ray;
 
 class Network {
 public:
+	using LinkEnd = std::pair<LinkPtr, unsigned char>;
+	using IntersectRayResult = std::variant<std::nullptr_t, NodePtr, LinkEnd, LinkPtr>;
 	explicit Network(const std::string & textureName);
+	virtual ~Network() = default;
 
 	[[nodiscard]] NodePtr findNodeAt(glm::vec3) const;
 	[[nodiscard]] NodePtr nodeAt(glm::vec3);
 	[[nodiscard]] std::pair<NodePtr, bool> newNodeAt(glm::vec3);
+	[[nodiscard]] IntersectRayResult intersectRay(const Ray &) const;
 
 	[[nodiscard]] Link::Nexts routeFromTo(const Link::End &, glm::vec3) const;
 	[[nodiscard]] Link::Nexts routeFromTo(const Link::End &, const NodePtr &) const;
 
 protected:
 	static void joinLinks(const LinkPtr & l, const LinkPtr & ol);
+	[[nodiscard]] virtual IntersectRayResult intersectRayLinks(const Ray &) const = 0;
 
 	using Nodes = std::set<NodePtr, PtrSorter<NodePtr>>;
 	Nodes nodes;
@@ -39,6 +46,9 @@ protected:
 	Collection<T> links;
 	void joinLinks(const LinkPtr &) const;
 
+protected:
+	[[nodiscard]] IntersectRayResult intersectRayLinks(const Ray &) const override;
+
 public:
 	template<typename L, typename... Params>
 	std::shared_ptr<L>
-- 
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